Hello, I am new to SEO, still studying and learning as I go. Recently I was told to grow in rank, I need to find who all is linking to my competitors and start a campaign asking those people with the highest authority to link to me. They were using Open site explorer from moz. But I can't afford to purchase this for $99 a month. Is there any other related tools that I can use that are either free or at least about $100 dollars for the year. Please advise. Thanks you guys.